[mlir] 'dyn_cast' is deprecated: Use mlir::dyn_cast<U>() instead (NFC)

/llvm-project/mlir/lib/Dialect/Vector/IR/VectorOps.cpp:2923:29: error: 'dyn_cast' is deprecated: Use mlir::dyn_cast<U>() instead [-Werror,-Wdeprecated-declarations]
 2923 |     if (auto intAttr = attr.dyn_cast<IntegerAttr>()) {
      |                             ^
/llvm-project/mlir/include/mlir/IR/Attributes.h:184:14: note: 'dyn_cast' has been explicitly marked deprecated here
  184 | U Attribute::dyn_cast() const {
      |              ^

Author: DamonFool

mlir/lib/Dialect/Vector/IR/VectorOps.cpp

@@ -2920,7 +2920,7 @@ class InsertOpConstantFolder final : public OpRewritePattern<InsertOp> {
   /// Converts the expected type to an IntegerAttr if there's
   /// a mismatch.
   Attribute convertIntegerAttr(Attribute attr, Type expectedType) const {
-    if (auto intAttr = attr.dyn_cast<IntegerAttr>()) {
+    if (auto intAttr = mlir::dyn_cast<IntegerAttr>(attr)) {
       if (intAttr.getType() != expectedType)
         return IntegerAttr::get(expectedType, intAttr.getInt());
     }